hwmon: (w83791d) add manual PWM support (6495ce18) · Commits · e / devices / android_kernel_fairphone_FP4

Documentation/hwmon/w83791d

+9 −6

drivers/hwmon/w83791d.c

+66 −1

Original line number	Original line	Diff line number	Diff line
	@@ -23,7 +23,7 @@
	Supports following chips:		Supports following chips:

	Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA		Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
	w83791d 10 5 3 3 0x71 0x5ca3 yes no		w83791d 10 5 5 3 0x71 0x5ca3 yes no

	The w83791d chip appears to be part way between the 83781d and the		The w83791d chip appears to be part way between the 83781d and the
	83792d. Thus, this file is derived from both the w83792d.c and		83792d. Thus, this file is derived from both the w83792d.c and
	@@ -45,6 +45,7 @@
	#define NUMBER_OF_VIN 10		#define NUMBER_OF_VIN 10
	#define NUMBER_OF_FANIN 5		#define NUMBER_OF_FANIN 5
	#define NUMBER_OF_TEMPIN 3		#define NUMBER_OF_TEMPIN 3
			#define NUMBER_OF_PWM 5

	/* Addresses to scan */		/* Addresses to scan */
	static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,		static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
	@@ -116,6 +117,14 @@ static const u8 W83791D_REG_FAN_MIN[NUMBER_OF_FANIN] = {
	0xBD, /* FAN 5 Count Low Limit in DataSheet */		0xBD, /* FAN 5 Count Low Limit in DataSheet */
	};		};

			static const u8 W83791D_REG_PWM[NUMBER_OF_PWM] = {
			0x81, /* PWM 1 duty cycle register in DataSheet */
			0x83, /* PWM 2 duty cycle register in DataSheet */
			0x94, /* PWM 3 duty cycle register in DataSheet */
			0xA0, /* PWM 4 duty cycle register in DataSheet */
			0xA1, /* PWM 5 duty cycle register in DataSheet */
			};

	static const u8 W83791D_REG_FAN_CFG[2] = {		static const u8 W83791D_REG_FAN_CFG[2] = {
	0x84, /* FAN 1/2 configuration */		0x84, /* FAN 1/2 configuration */
	0x95, /* FAN 3 configuration */		0x95, /* FAN 3 configuration */
	@@ -276,6 +285,9 @@ struct w83791d_data {
	two sensors with three values		two sensors with three values
	(cur, over, hyst) */		(cur, over, hyst) */

			/* PWMs */
			u8 pwm[5]; /* pwm duty cycle */

	/* Misc */		/* Misc */
	u32 alarms; /* realtime status register encoding,combined */		u32 alarms; /* realtime status register encoding,combined */
	u8 beep_enable; /* Global beep enable */		u8 beep_enable; /* Global beep enable */
	@@ -653,6 +665,48 @@ static struct sensor_device_attribute sda_fan_alarm[] = {
	SENSOR_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 22),		SENSOR_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 22),
	};		};

			/* read/write PWMs */
			static ssize_t show_pwm(struct device dev, struct device_attribute attr,
			char *buf)
			{
			struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
			int nr = sensor_attr->index;
			struct w83791d_data *data = w83791d_update_device(dev);
			return sprintf(buf, "%u\n", data->pwm[nr]);
			}

			static ssize_t store_pwm(struct device dev, struct device_attribute attr,
			const char *buf, size_t count)
			{
			struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
			struct i2c_client *client = to_i2c_client(dev);
			struct w83791d_data *data = i2c_get_clientdata(client);
			int nr = sensor_attr->index;
			unsigned long val;

			if (strict_strtoul(buf, 10, &val))
			return -EINVAL;

			mutex_lock(&data->update_lock);
			data->pwm[nr] = SENSORS_LIMIT(val, 0, 255);
			w83791d_write(client, W83791D_REG_PWM[nr], data->pwm[nr]);
			mutex_unlock(&data->update_lock);
			return count;
			}

			static struct sensor_device_attribute sda_pwm[] = {
			SENSOR_ATTR(pwm1, S_IWUSR \| S_IRUGO,
			show_pwm, store_pwm, 0),
			SENSOR_ATTR(pwm2, S_IWUSR \| S_IRUGO,
			show_pwm, store_pwm, 1),
			SENSOR_ATTR(pwm3, S_IWUSR \| S_IRUGO,
			show_pwm, store_pwm, 2),
			SENSOR_ATTR(pwm4, S_IWUSR \| S_IRUGO,
			show_pwm, store_pwm, 3),
			SENSOR_ATTR(pwm5, S_IWUSR \| S_IRUGO,
			show_pwm, store_pwm, 4),
			};

	/* read/write the temperature1, includes measured value and limits */		/* read/write the temperature1, includes measured value and limits */
	static ssize_t show_temp1(struct device dev, struct device_attribute devattr,		static ssize_t show_temp1(struct device dev, struct device_attribute devattr,
	char *buf)		char *buf)
	@@ -917,6 +971,9 @@ static struct attribute *w83791d_attributes[] = {
	&sda_beep_ctrl[1].dev_attr.attr,		&sda_beep_ctrl[1].dev_attr.attr,
	&dev_attr_cpu0_vid.attr,		&dev_attr_cpu0_vid.attr,
	&dev_attr_vrm.attr,		&dev_attr_vrm.attr,
			&sda_pwm[0].dev_attr.attr,
			&sda_pwm[1].dev_attr.attr,
			&sda_pwm[2].dev_attr.attr,
	NULL		NULL
	};		};

	@@ -930,6 +987,8 @@ static const struct attribute_group w83791d_group = {
	static struct attribute *w83791d_attributes_fanpwm45[] = {		static struct attribute *w83791d_attributes_fanpwm45[] = {
	FAN_UNIT_ATTRS(3),		FAN_UNIT_ATTRS(3),
	FAN_UNIT_ATTRS(4),		FAN_UNIT_ATTRS(4),
			&sda_pwm[3].dev_attr.attr,
			&sda_pwm[4].dev_attr.attr,
	NULL		NULL
	};		};

	@@ -1260,6 +1319,12 @@ static struct w83791d_data w83791d_update_device(struct device dev)
	for (i = 0; i < 3; i++)		for (i = 0; i < 3; i++)
	data->fan_div[i] \|= (vbat_reg >> (3 + i)) & 0x04;		data->fan_div[i] \|= (vbat_reg >> (3 + i)) & 0x04;

			/* Update PWM duty cycle */
			for (i = 0; i < NUMBER_OF_PWM; i++) {
			data->pwm[i] = w83791d_read(client,
			W83791D_REG_PWM[i]);
			}

	/* Update the first temperature sensor */		/* Update the first temperature sensor */
	for (i = 0; i < 3; i++) {		for (i = 0; i < 3; i++) {
	data->temp1[i] = w83791d_read(client,		data->temp1[i] = w83791d_read(client,

Original line number	Original line	Diff line number	Diff line
	@@ -58,29 +58,32 @@ internal state that allows no clean access (Bank with ID register is not
	currently selected). If you know the address of the chip, use a 'force'		currently selected). If you know the address of the chip, use a 'force'
	parameter; this will put it into a more well-behaved state first.		parameter; this will put it into a more well-behaved state first.

	The driver implements three temperature sensors, five fan rotation speed		The driver implements three temperature sensors, ten voltage sensors,
	sensors, and ten voltage sensors.		five fan rotation speed sensors and manual PWM control of each fan.

	Temperatures are measured in degrees Celsius and measurement resolution is 1		Temperatures are measured in degrees Celsius and measurement resolution is 1
	degC for temp1 and 0.5 degC for temp2 and temp3. An alarm is triggered when		degC for temp1 and 0.5 degC for temp2 and temp3. An alarm is triggered when
	the temperature gets higher than the Overtemperature Shutdown value; it stays		the temperature gets higher than the Overtemperature Shutdown value; it stays
	on until the temperature falls below the Hysteresis value.		on until the temperature falls below the Hysteresis value.

			Voltage sensors (also known as IN sensors) report their values in millivolts.
			An alarm is triggered if the voltage has crossed a programmable minimum
			or maximum limit.

	Fan rotation speeds are reported in RPM (rotations per minute). An alarm is		Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
	triggered if the rotation speed has dropped below a programmable limit. Fan		triggered if the rotation speed has dropped below a programmable limit. Fan
	readings can be divided by a programmable divider (1, 2, 4, 8, 16,		readings can be divided by a programmable divider (1, 2, 4, 8, 16,
	32, 64 or 128 for all fans) to give the readings more range or accuracy.		32, 64 or 128 for all fans) to give the readings more range or accuracy.

	Voltage sensors (also known as IN sensors) report their values in millivolts.		Each fan controlled is controlled by PWM. The PWM duty cycle can be read and
	An alarm is triggered if the voltage has crossed a programmable minimum		set for each fan separately. Valid values range from 0 (stop) to 255 (full).
	or maximum limit.

	The w83791d has a global bit used to enable beeping from the speaker when an		The w83791d has a global bit used to enable beeping from the speaker when an
	alarm is triggered as well as a bitmask to enable or disable the beep for		alarm is triggered as well as a bitmask to enable or disable the beep for
	specific alarms. You need both the global beep enable bit and the		specific alarms. You need both the global beep enable bit and the
	corresponding beep bit to be on for a triggered alarm to sound a beep.		corresponding beep bit to be on for a triggered alarm to sound a beep.

	The sysfs interface to the gloabal enable is via the sysfs beep_enable file.		The sysfs interface to the global enable is via the sysfs beep_enable file.
	This file is used for both legacy and new code.		This file is used for both legacy and new code.

	The sysfs interface to the beep bitmask has migrated from the original legacy		The sysfs interface to the beep bitmask has migrated from the original legacy